Millions of people in the U.S. suffer from degenerative arthritis of their knees. At least 20% of these patients have arthritis localized to their patellofemoral joint ( knee cap) with an addressable market of $3 Billion. Until now the only available options have been highly invasive surgeries, including knee replacement. The ZKR Patella LIFT implant offers patients a minimally invasive alternative to knee replacement at a significantly lower cost and a much faster recovery.